Autogenous Shrinkage Properties of Ultra-High-Strength Concrete Subjected to Early Heat Curing and a Technique for Their Prediction

Abstract

Concrete with a design strength of 100 to 150 N/mm 2 made using low-heat portland cement and silica fume (LSF) was subjected to thermal histories with different maximum temperatures (Tmax) to examine their autogenous shrinkage properties. The autogenous shrinkage properties were found to significantly change when Tmax exceeded 45 to 60�C. Comparing these results with past studies using portland cement, the authors clarified the autogenous shrinkage properties of LSF concrete and proposed a technique for their prediction by modifying conventional equations. Furthermore, the applicability of the proposed method was verified.